DNA methylation patterns and epigenetic memory
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TLDR
The heritability of methylation states and the secondary nature of the decision to invite or exclude methylation support the idea that DNA methylation is adapted for a specific cellular memory function in development.Abstract:
The character of a cell is defined by its constituent proteins, which are the result of specific patterns of gene expression. Crucial determinants of gene expression patterns are DNA-binding transcription factors that choose genes for transcriptional activation or repression by recognizing the sequence of DNA bases in their promoter regions. Interaction of these factors with their cognate sequences triggers a chain of events, often involving changes in the structure of chromatin, that leads to the assembly of an active transcription complex (e.g., Cosma et al. 1999). But the types of transcription factors present in a cell are not alone sufficient to define its spectrum of gene activity, as the transcriptional potential of a genome can become restricted in a stable manner during development. The constraints imposed by developmental history probably account for the very low efficiency of cloning animals from the nuclei of differentiated cells (Rideout et al. 2001; Wakayama and Yanagimachi 2001). A “transcription factors only” model would predict that the gene expression pattern of a differentiated nucleus would be completely reversible upon exposure to a new spectrum of factors. Although many aspects of expression can be reprogrammed in this way (Gurdon 1999), some marks of differentiation are evidently so stable that immersion in an alien cytoplasm cannot erase the memory. The genomic sequence of a differentiated cell is thought to be identical in most cases to that of the zygote from which it is descended (mammalian B and T cells being an obvious exception). This means that the marks of developmental history are unlikely to be caused by widespread somatic mutation. Processes less irrevocable than mutation fall under the umbrella term “epigenetic” mechanisms. A current definition of epigenetics is: “The study of mitotically and/or meiotically heritable changes in gene function that cannot be explained by changes in DNA sequence” (Russo et al. 1996). There are two epigenetic systems that affect animal development and fulfill the criterion of heritability: DNA methylation and the Polycomb-trithorax group (Pc-G/trx) protein complexes. (Histone modification has some attributes of an epigenetic process, but the issue of heritability has yet to be resolved.) This review concerns DNA methylation, focusing on the generation, inheritance, and biological significance of genomic methylation patterns in the development of mammals. Data will be discussed favoring the notion that DNA methylation may only affect genes that are already silenced by other mechanisms in the embryo. Embryonic transcription, on the other hand, may cause the exclusion of the DNA methylation machinery. The heritability of methylation states and the secondary nature of the decision to invite or exclude methylation support the idea that DNA methylation is adapted for a specific cellular memory function in development. Indeed, the possibility will be discussed that DNA methylation and Pc-G/trx may represent alternative systems of epigenetic memory that have been interchanged over evolutionary time. Animal DNA methylation has been the subject of several recent reviews (Bird and Wolffe 1999; Bestor 2000; Hsieh 2000; Costello and Plass 2001; Jones and Takai 2001). For recent reviews of plant and fungal DNA methylation, see Finnegan et al. (2000), Martienssen and Colot (2001), and Matzke et al. (2001).read more
Citations
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Epigenetic regulation of gene expression: how the genome integrates intrinsic and environmental signals
Rudolf Jaenisch,Adrian Bird +1 more
TL;DR: Advances in the understanding of the mechanism and role of DNA methylation in biological processes are reviewed, showing that epigenetic mechanisms seem to allow an organism to respond to the environment through changes in gene expression.
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The fundamental role of epigenetic events in cancer
Peter A. Jones,Stephen B. Baylin +1 more
TL;DR: This review discusses patterns of DNA methylation and chromatin structure in neoplasia and the molecular alterations that might cause them and/or underlie altered gene expression in cancer.
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Conversion of 5-Methylcytosine to 5-Hydroxymethylcytosine in Mammalian DNA by MLL Partner TET1
Mamta Tahiliani,Kian Peng Koh,Yinghua Shen,William A. Pastor,Hozefa S. Bandukwala,Yevgeny Brudno,Suneet Agarwal,Lakshminarayan M. Iyer,David R. Liu,L. Aravind,Anjana Rao +10 more
TL;DR: It is shown here that TET1, a fusion partner of the MLL gene in acute myeloid leukemia, is a 2-oxoglutarate (2OG)- and Fe(II)-dependent enzyme that catalyzes conversion of 5mC to 5-hydroxymethylcytosine (hmC) in cultured cells and in vitro.
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Epigenetics in Cancer
TL;DR: The current understanding of alterations in the epigenetic landscape that occur in cancer compared with normal cells, the roles of these changes in cancer initiation and progression, including the cancer stem cell model, and the potential use of this knowledge in designing more effective treatment strategies are discussed.
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Gene Silencing in Cancer in Association with Promoter Hypermethylation
TL;DR: The mechanisms of gene silencing in cancer and clinical applications of this phenomenon are reviewed, especially tumor-suppressor genes.
References
More filters
Journal ArticleDOI
Initial sequencing and analysis of the human genome.
Eric S. Lander,Lauren Linton,Bruce W. Birren,Chad Nusbaum,Michael C. Zody,Jennifer Baldwin,Keri Devon,Ken Dewar,Michael Doyle,William Fitzhugh,Roel Funke,Diane Gage,Katrina Harris,Andrew Heaford,John Howland,Lisa Kann,Jessica A. Lehoczky,Rosie Levine,Paul A. McEwan,Kevin McKernan,James Meldrim,Jill P. Mesirov,Cher Miranda,William Morris,Jerome Naylor,Christina Raymond,Mark Rosetti,Ralph Santos,Andrew Sheridan,Carrie Sougnez,Nicole Stange-Thomann,Nikola Stojanovic,Aravind Subramanian,Dudley Wyman,Jane Rogers,John Sulston,R Ainscough,Stephan Beck,David Bentley,John Burton,C M Clee,Nigel P. Carter,Alan Coulson,Rebecca Deadman,Panos Deloukas,Andrew Dunham,Ian Dunham,Richard Durbin,Lisa French,Darren Grafham,Simon G. Gregory,Tim Hubbard,Sean Humphray,Adrienne Hunt,Matthew Jones,Christine Lloyd,Amanda McMurray,Lucy Matthews,Simon Mercer,Sarah Milne,James C. Mullikin,Andrew J. Mungall,Robert W. Plumb,Mark T. Ross,Ratna Shownkeen,Sarah Sims,Robert H. Waterston,Richard K. Wilson,LaDeana W. Hillier,John Douglas Mcpherson,Marco A. Marra,Elaine R. Mardis,Lucinda Fulton,Asif T. Chinwalla,Kymberlie H. Pepin,Warren Gish,Stephanie L. Chissoe,Michael C. Wendl,Kim D. Delehaunty,Tracie L. Miner,Andrew Delehaunty,Jason B. Kramer,Lisa Cook,Robert S. Fulton,Douglas L. Johnson,Patrick Minx,Sandra W. Clifton,Trevor Hawkins,Elbert Branscomb,Paul Predki,Paul G. Richardson,Sarah Wenning,Tom Slezak,Norman A. Doggett,Jan Fang Cheng,Anne S. Olsen,Susan Lucas,Christopher J. Elkin,Edward Uberbacher,Marvin Frazier,Richard A. Gibbs,Donna M. Muzny,Steven E. Scherer,John Bouck,Erica Sodergren,Kim C. Worley,Catherine M. Rives,James H. Gorrell,Michael L. Metzker,Susan L. Naylor,Raju Kucherlapati,David L. Nelson,George M. Weinstock,Yoshiyuki Sakaki,Asao Fujiyama,Masahira Hattori,Tetsushi Yada,Atsushi Toyoda,Takehiko Itoh,Chiharu Kawagoe,Hidemi Watanabe,Yasushi Totoki,Todd D. Taylor,Jean Weissenbach,Roland Heilig,William Saurin,François Artiguenave,Philippe Brottier,Thomas Brüls,Eric Pelletier,Catherine Robert,Patrick Wincker,André Rosenthal,Matthias Platzer,Gerald Nyakatura,Stefan Taudien,Andreas Rump,Douglas R. Smith,Lynn Doucette-Stamm,Marc Rubenfield,Keith Weinstock,Mei Lee Hong,Joann Dubois,Huanming Yang,Jun Yu,Jian Wang,Guyang Huang,Jun Gu,Leroy Hood,Lee Rowen,Anup Madan,Shizen Qin,Ronald W. Davis,Nancy A. Federspiel,A. Pia Abola,Michael Proctor,Bruce A. Roe,Feng Chen,Huaqin Pan,Juliane Ramser,Hans Lehrach,Richard Reinhardt,W. Richard McCombie,Melissa De La Bastide,Neilay Dedhia,H. Blöcker,K. Hornischer,Gabriele Nordsiek,Richa Agarwala,L. Aravind,Jeffrey A. Bailey,Alex Bateman,Serafim Batzoglou,Ewan Birney,Peer Bork,Daniel G. Brown,Christopher B. Burge,Lorenzo Cerutti,Hsiu Chuan Chen,Deanna M. Church,Michele Clamp,Richard R. Copley,Tobias Doerks,Sean R. Eddy,Evan E. Eichler,Terrence S. Furey,James E. Galagan,James G. R. Gilbert,Cyrus L. Harmon,Yoshihide Hayashizaki,David Haussler,Henning Hermjakob,Karsten Hokamp,Wonhee Jang,L. Steven Johnson,Thomas A. Jones,Simon Kasif,Arek Kaspryzk,Scot Kennedy,W. James Kent,Paul Kitts,Eugene V. Koonin,Ian F Korf,David Kulp,Doron Lancet,Todd M. Lowe,Aoife McLysaght,Tarjei S. Mikkelsen,John V. Moran,Nicola Mulder,Victor J. Pollara,Chris P. Ponting,Greg Schuler,Jörg Schultz,Guy Slater,Arian F.A. Smit,Elia Stupka,Joseph Szustakowki,Danielle Thierry-Mieg,Jean Thierry-Mieg,Lukas Wagner,John W. Wallis,Raymond Wheeler,Alan Williams,Yuri I. Wolf,Kenneth H. Wolfe,Shiaw Pyng Yang,Ru Fang Yeh,Francis S. Collins,Mark S. Guyer,Jane Peterson,Adam Felsenfeld,Kris A. Wetterstrand,Richard M. Myers,Jeremy Schmutz,Mark Dickson,Jane Grimwood,David R. Cox,Maynard V. Olson,Rajinder Kaul,Christopher K. Raymond,Nobuyoshi Shimizu,Kazuhiko Kawasaki,Shinsei Minoshima,Glen A. Evans,Maria Athanasiou,Roger A. Schultz,Aristides Patrinos,Michael J. Morgan +248 more
TL;DR: The results of an international collaboration to produce and make freely available a draft sequence of the human genome are reported and an initial analysis is presented, describing some of the insights that can be gleaned from the sequence.
Journal ArticleDOI
The sequence of the human genome.
J. Craig Venter,Mark Raymond Adams,Eugene W. Myers,Peter W. Li,Richard J. Mural,Granger G. Sutton,Hamilton O. Smith,Mark Yandell,Cheryl A. Evans,Robert A. Holt,Jeannine D. Gocayne,Peter Amanatides,Richard M. Ballew,Daniel H. Huson,Jennifer R. Wortman,Qing Zhang,Chinnappa D. Kodira,Xiangqun H. Zheng,Lin Chen,Marian P. Skupski,Gangadharan Subramanian,Paul Thomas,Jinghui Zhang,George L. Gabor Miklos,Catherine R. Nelson,Samuel Broder,Andrew G. Clark,J. H. Nadeau,Victor A. McKusick,Norton D. Zinder,Arnold J. Levine,Richard J. Roberts,M. I. Simon,Carolyn W. Slayman,Michael W. Hunkapiller,Randall Bolanos,Arthur L. Delcher,Ian M. Dew,Daniel Fasulo,Michael Flanigan,Liliana Florea,Aaron L. Halpern,Sridhar Hannenhalli,Saul A. Kravitz,Samuel Levy,Clark M. Mobarry,Knut Reinert,Karin A. Remington,Jane Abu-Threideh,Ellen M. Beasley,Kendra Biddick,Vivien Bonazzi,Rhonda Brandon,Michele Cargill,Ishwar Chandramouliswaran,Rosane Charlab,Kabir Chaturvedi,Zuoming Deng,Valentina Di Francesco,Patrick Dunn,Karen Eilbeck,Carlos Evangelista,Andrei Gabrielian,Weiniu Gan,Wangmao Ge,Fangcheng Gong,Zhiping Gu,Ping Guan,Thomas J. Heiman,Maureen E. Higgins,Rui-Ru Ji,Zhaoxi Ke,Karen A. Ketchum,Zhongwu Lai,Yiding Lei,Zhenya Li,Jiayin Li,Yong Liang,Xiaoying Lin,Fu Lu,Gennady V. Merkulov,Natalia Milshina,Helen M. Moore,Ashwinikumar K Naik,Vaibhav A. Narayan,Beena Neelam,Deborah Nusskern,Douglas B. Rusch,Steven L. Salzberg,Wei Shao,Bixiong Chris Shue,Jingtao Sun,Zhen Yuan Wang,Aihui Wang,Xin Wang,Jian Wang,Ming-Hui Wei,Ron Wides,Chunlin Xiao,Chunhua Yan,Alison Yao,Jane Ye,Ming Zhan,Weiqing Zhang,Hongyu Zhang,Qi Zhao,Liansheng Zheng,Fei Zhong,Wenyan Zhong,Shiaoping C. Zhu,Shaying Zhao,Dennis A. Gilbert,Suzanna Baumhueter,Gene Spier,Christine Carter,Anibal Cravchik,Trevor Woodage,Feroze Ali,Huijin An,Aderonke Awe,Danita Baldwin,Holly Baden,Mary Barnstead,Ian Barrow,Karen Beeson,Dana A. Busam,Amy Carver,Ming Lai Cheng,Liz Curry,Steve Danaher,Lionel Davenport,Raymond Desilets,Susanne Dietz,Kristina Dodson,Lisa Doup,Steven Ferriera,Neha Garg,Andres Gluecksmann,Brit J. Hart,Jason Haynes,Charles Haynes,Cheryl Heiner,Suzanne Hladun,Damon Hostin,Jarrett Houck,Timothy Howland,Chinyere Ibegwam,Jeffery Johnson,Francis Kalush,Lesley Kline,Shashi Koduru,Amy Love,Felecia Mann,David May,Steven McCawley,Tina C. McIntosh,Ivy McMullen,Mee Moy,Linda Moy,Brian Murphy,Keith Nelson,Cynthia Pfannkoch,Eric Pratts,Vinita Puri,Hina Qureshi,Matthew Reardon,Robert Rodriguez,Yu-Hui Rogers,Deanna Romblad,Bob Ruhfel,Richard T. Scott,Cynthia Sitter,Michelle Smallwood,Erin Stewart,Renee Strong,Ellen Suh,Reginald Thomas,Ni Ni Tint,Sukyee Tse,Claire Vech,Gary Wang,Jeremy Wetter,Sherita Williams,Monica Williams,Sandra Windsor,Emily Winn-Deen,Keriellen Wolfe,Jayshree Zaveri,Karena Zaveri,Josep F. Abril,Roderic Guigó,Michael J. Campbell,Kimmen Sjölander,Brian Karlak,Anish Kejariwal,Huaiyu Mi,Betty Lazareva,Thomas Hatton,Apurva Narechania,Karen Diemer,Anushya Muruganujan,Nan Guo,Shinji Sato,Vineet Bafna,Sorin Istrail,Ross Lippert,Russell Schwartz,Brian P. Walenz,Shibu Yooseph,David Allen,Anand Basu,James Baxendale,Louis Blick,Marcelo Caminha,John Carnes-Stine,Parris Caulk,Yen-Hui Chiang,My Coyne,Carl Dahlke,Anne Deslattes Mays,Maria Dombroski,Michael Donnelly,Dale Ely,Shiva Esparham,Carl Fosler,Harold Gire,Stephen Glanowski,Kenneth Glasser,Anna Glodek,Mark Gorokhov,Ken Graham,Barry Gropman,Michael Harris,Jeremy Heil,Scott Henderson,Jeffrey Hoover,Donald Jennings,Catherine Jordan,James Jordan,John Kasha,Leonid Kagan,Cheryl L. Kraft,Alexander Levitsky,Mark Lewis,Xiangjun Liu,John Lopez,Daniel Ma,William H. Majoros,Joe McDaniel,Sean C. Murphy,Matthew Newman,Trung Hieu Nguyen,Ngoc Nguyen,Marc Nodell,Sue Pan,Jim Peck,Marshall Peterson,William Rowe,Robert Sanders,John Scott,Michael Simpson,Thomas J. Smith,Arlan Sprague,Timothy B. Stockwell,Russell Turner,Eli Venter,Mei Wang,Meiyuan Wen,David Wu,Mitchell Wu,Ashley Xia,Ali Zandieh,Xiaohong Zhu +272 more
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